METHOD OF DELIVERING A SOLVENT IN A WELL Russian patent published in 2019 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and is intended for improvement of technologies for removal of asphaltene-resin-paraffin deposits (ARPD) from underground equipment of oil producing wells having an intelligent component in the form of facilities for diagnostics of volume and location of deposits in a column of lifting pipes. To be removed ARPD from tubing string without their lifting to surface preliminarily inside column from wellhead to centrifugal pump reagent tube is installed on stationary basis. After determining the volume and location of deposits, the wellhead pump sends a calculated amount of organic solvent to the reagent tube at the command of the control station controller. At the second stage, the solvent collected above the subsurface pump is lifted along the tubing string by starting the downhole electric centrifugal pump at the calculated and required time determined by the distance of the lower part of sediments from the subsurface pump along the length of the tubing string.

EFFECT: higher reliability, reduced time costs when delivering solvent.

1 cl, 1 dwg